Machine-tool holder



(No Model.)

D. S. SEYMOUR.

MACHINE TOOL HOLDER. No. 371.712. Patented 0ot.\.18, 1887."

NllE' STATES PATENT Orrrcn.

DUDLEY S. SEYMOUR, OF HARTFORD, CONNECTICUT.

MACHINE=TOOL HOLDER.

SPECIFICATION forming part of Letters Patent No. 371,712, dated Goteber 18, 1887.

' Application filed June 27, 1887. Serial No. 242,584. (No model.)

To all whom. 2'6 may concern.

Be it known that l, DUDLEY S. SEYMOUR, of Hartford, Connecticut, have invented a new and useful Machine-Tool Holder, of which the following description and claim constitute the specification, and which is illustrated by the accompanying sheet of drawings.

This invention is a holder to clasp and retain the cutting tool of alathe, planer, or other machine in which such a tool is used.

Figure l is a side view of the tool holderand the tool. Fig. 2 is an end view, and Fig. 3 is a top view, of the same. Fig. 4 is a side view of the stock of the tool-holder, and Fig. 5 is a section ol the eye of the eyebolt on the dotted line of Fig. 2.

A is the stock of the tool'holdcr. It is bifurcated by the slot 13, and is provided with the diagonaterossed grooves C and D on one of its sides and across thatslot.

E is an eyebolt. Those portions of the in terior of its eye which'are shown in Fig. 5 constitute crossed grooves, the bottoms of which are denoted by the letters F and G, respect ively. The eyebolt is also provided with the washer H and the nut I.

J is the tool, cut or broken from a square or round steel rod of commerce and made without any other operation, except being ground to points, as shown.

The mode of adjustment consists simply in placing the tool in the eye of the eyebolt and in either of the grooves C and D, and then in turning up the nut as far as possible. The

eyebolt .thus draws that portion of the tool 5 which is between the two parts of the groove occupied by it, and thus holds the tool more rigidly than would be possible if that groove were continuous throughoutits length.

When the tool is in the groove 0 in the po- 0 sition shown in Fig. 1, its upper end is adapted to left-hand workthat is to say, is adapted to work toward the eye of the beholder. To adapt the tool to right-hand work, it is taken out of the groove 0, turned half-way around 5 on its longitudinal axis, placed in the groo e D with its lower end still downward, and then turned with the stock A halfway around on the longitudinal axis of the latter.

The special utility of this tool-holder resides 0 in the fact that it willrigidly hold a tool made from a steel rod of square, round, or other 7 DUDLEY S. SEYMOUR.

Witnesses:

ALBERT H. WALKER, FRANK I-I. PIERPONT. 

